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The role of first formant information in simulated electro-acoustic hearing

The role of first formant information in simulated electro-acoustic hearing
The role of first formant information in simulated electro-acoustic hearing
Cochlear implant (CI) recipients with residual hearing show improved performance with the addition of low-frequency acoustic stimulation (electro-acoustic stimulation, EAS). The present study sought to determine whether a synthesized first formant (F1) signal provided benefit to speech recognition in simulated EAS hearing and to compare such benefit with that from other low-frequency signals. A further aim was to determine if F1 amplitude or frequency was more important in determining benefit and if F1 benefit varied with formant bandwidth. In two experiments, sentence recordings from a male speaker were processed via a simulation of a partial insertion CI, and presented to normal hearing listeners in combination with various low-frequency signals, including a tone tracking fundamental frequency (F0), low-pass filtered speech, and signals based on F1 estimation. A simulated EAS benefit was found with F1 signals, and was similar to the benefit from F0 or low-pass filtered speech. The benefit did not differ significantly with the narrowing or widening of the F1 bandwidth. The benefit from low-frequency envelope signals was significantly less than the benefit from any low-frequency signal containing fine frequency information. Results indicate that F1 provides a benefit in simulated EAS hearing but low frequency envelope information is less important than low frequency fine structure in determining such benefit.
0001-4966
4279-4289
Verschuur, Carl
5e15ee1c-3a44-4dbe-ad43-ec3b50111e41
Boland, Conor
23333cfc-c268-42d6-a84e-6f32c33993c0
Frost, Emily
6ea4ca47-97fc-4037-aaf7-c77732f19d72
Constable, Jack
24b9842a-c012-4cec-b599-10f405b86e33
Verschuur, Carl
5e15ee1c-3a44-4dbe-ad43-ec3b50111e41
Boland, Conor
23333cfc-c268-42d6-a84e-6f32c33993c0
Frost, Emily
6ea4ca47-97fc-4037-aaf7-c77732f19d72
Constable, Jack
24b9842a-c012-4cec-b599-10f405b86e33

Verschuur, Carl, Boland, Conor, Frost, Emily and Constable, Jack (2013) The role of first formant information in simulated electro-acoustic hearing. Journal of the Acoustical Society of America, 133 (6), 4279-4289. (doi:10.1121/1.4803910).

Record type: Article

Abstract

Cochlear implant (CI) recipients with residual hearing show improved performance with the addition of low-frequency acoustic stimulation (electro-acoustic stimulation, EAS). The present study sought to determine whether a synthesized first formant (F1) signal provided benefit to speech recognition in simulated EAS hearing and to compare such benefit with that from other low-frequency signals. A further aim was to determine if F1 amplitude or frequency was more important in determining benefit and if F1 benefit varied with formant bandwidth. In two experiments, sentence recordings from a male speaker were processed via a simulation of a partial insertion CI, and presented to normal hearing listeners in combination with various low-frequency signals, including a tone tracking fundamental frequency (F0), low-pass filtered speech, and signals based on F1 estimation. A simulated EAS benefit was found with F1 signals, and was similar to the benefit from F0 or low-pass filtered speech. The benefit did not differ significantly with the narrowing or widening of the F1 bandwidth. The benefit from low-frequency envelope signals was significantly less than the benefit from any low-frequency signal containing fine frequency information. Results indicate that F1 provides a benefit in simulated EAS hearing but low frequency envelope information is less important than low frequency fine structure in determining such benefit.

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Published date: 2013
Organisations: Human Sciences Group

Identifiers

Local EPrints ID: 353416
URI: http://eprints.soton.ac.uk/id/eprint/353416
ISSN: 0001-4966
PURE UUID: cfecf6df-2ad4-4565-ad37-72e6692dd1dc

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Date deposited: 06 Jun 2013 10:47
Last modified: 08 Jan 2022 09:08

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Contributors

Author: Carl Verschuur
Author: Conor Boland
Author: Emily Frost
Author: Jack Constable

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